diff --git a/checkout.bat b/checkout.bat
index 05569b3..b772acb 100644
--- a/checkout.bat
+++ b/checkout.bat
@@ -41,6 +41,8 @@ cd %SUB_DIR%
 
 call npm install
 
-call npm run build
+if "%TAG%" == "hw4" (
+  call npm run build
+)
 
 call npm start
diff --git a/checkout.sh b/checkout.sh
index a368d27..29b1d08 100755
--- a/checkout.sh
+++ b/checkout.sh
@@ -31,5 +31,5 @@ git clone https://bitbucket.org/${USER}/i399 $TMP
  git checkout ${TAG} && \
  cd "${SUB_DIR}" && \
  npm install && \
- npm run build && \
+ if [ ${TAG} == "hw4" ]; then npm run build; fi && \
  npm start)